body{
    margin: 0;
    background-color: aliceblue;
}
#all{
    margin: 0 auto;
    width: 1100px;
}
#all .top{
    float: left;
    margin: 0;
    width: 1100px;
    height: 100px;
    background-image: url("../img/index_top.jpg");
    font-size: 20px;
}
#all .top .left{
    float: left;
    margin: 10px 0 0 100px;
    width: 400px;
    height: 40px;
}

#all .top .right{
    float: left;
    margin: 10px 0 0 50px;
    width: 550px;
    height: 40px;
}
#all .top .right a{
    text-decoration: none;
    color: black;
}
#all .center{
    float: left;
    margin: 0;
    width: 1100px;
}
#all .center .tip{
    float: left;
    margin: 10px 10px;
    width: 200px;
    height: 250px;
}
#all .center .tip .check{
    float: left;
    margin: 0;
    width: 200px;
    height: 200px;
    border: 1px solid #cccccc;
}

#all .center .tip .check a >img{
    width: 200px;
    height: 200px;

}

#all .center .tip .bottom{
    float: left;
    margin: 0;
    width: 200px;
    height: 50px;
    background-color: antiquewhite;
}